Relay and casing therefor



Nov. 9 1,515,206

G. W. HUEY RELAY AND CASING THEREFOR Filed NOV. 12 1920 2 Sheets-Sheet 1 lllll.

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G. w. HUEY RELAY AND CASING THEREFOR Filed Nov. 12 1920 2 Sheets-Sheet 2 wnuzsszs: INVENTOR A/Jma/nw Georye W 12219 W ATTORNEY Patented Nov. 11, 1924.

UNITED STATES PATENT OFFICE.

GEORGE W. HUEY, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR T WESTINGHOUSE ELECTRIC 8: MANUFACTURING COMPANY. A CORPORATION OF PENNSYLVANIA.

RELAY AND CASING THEREFOR.

Application filed November 12, 1920. Serial No. 423,559.

T 0 all whom it may concern:

B it known that I, GEORGE V..HUEY, a (lllZPn of the United States, and a resident of Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Relays and Casings Therefor, of which the following is a specification.

My invention relates to relays having en- 1 closing casings and particularly to relays that are rendered inoperative when their casings are removed.

One object of my invention is to provide a relay and an enclosing casing therefor that shall have means for rendering the relay inoperative when the casing is removed.

Another object of my invention is to pro vide a device of the above indicated character that shall be simple and economical in 20 construction and reliable in its operation.

Figure 1 of the accompayin drawings is a front elevational View of a relay and a casing therefor embodying my invention.

Fig. 2 is'a side fragmentary view of the device shown in Fig. 1, and

Figs. 3 and 4 are diagrammatic views of electrical circuits illustrating the connection thereto of the device shown in Figs. 1 and 2.

Fig. 5 is an enlarged View showing the switch contacts and operating mechanism.

A translating device 1 is adapted to receive energy from a source 2 of electromotive force through a circuit interrupter 3. The circuit interrupter 3 is provided with a holding magnet 4 that is energized by a winding 5, the circuit of which is normally completed through a plurality of contact members 6 and 7 and a bridging member 8 of a control relay 9. The terminals of the winding 5 are-connected, throu h the contact members 6 and 7 of the bri ging member 8 of the relay 9, to the conductors of the circuit 2.

The control relay 9 is adapted, when sufficiently energized, to disengage the bridging member 8 from the contact members 6 and 7. The relay 9 comprises a plurality of current windings 10 that are adapted to be energized by the circuit current, a plurality oi": contact members 11 and 12 that are normally bridged by the bridging member 13 and a plurality of plunger rods 15 that are adapted to be actuated, when the windings 10 are sufficiently energized, to so actuate the supporting member 14 as to effect the disengagement of the bridging member 13 from the contact members 11 and 12.

A resilient member 16 has one end thereof secured on a stationary supporting member 17 that is disposed adjacent the contact members 12 and 13 on a base 18 that serves as a support for the relay 9. The resilient member 16 is so looped that the movable end 19 thereof may engage the bridging member 13 and cause it to disengage the contact members 11 and 12 when the resilient member 16 is released. A casin 20, that is employed to close the relay 9, is provided with a cover that has a protruding arm member 22 disposed thereon which serves to so restrain the resilient member 16, when the cover 2.1v is in position, as to prevent the resilient member 16 from effecting the disengagement of the bridging member 13 from the contact members 11 and 12. When the cover 21 is in position and the resilientmember 16 is restrained by the projecting member 22, the compression force of a spring 23, that acts on the pivoted member 14:, serves to maintain the bridging member 13 in engagement with the contact members 11 and 12. Upon the removal of the cover 21, the force of the resilient member 16 is suflicient to disengage the bridging member 13 from the contact members 11 and 12, against the compression force of the spring 23.

Thus, while the casing of the relay 9 is open, the circuit of the holding magnet 4 is maintained open and the circuit interrupter 3 cannot be maintained closed.

My invention is not limited to the specific structure that is illustrated, as various changes may be made therein Without departing from the spirit and scope of my invention as set forth in the appended claims.

I claim as my invention:

1. An enclosed relay comprising a switch member having an open and a closed position, a spring normally holding the switch in its closed position, electromagnetic means for actuating the switch to its open position under predetermined current conditions, a

second spring operable to actuate and hold the switch in its open position against the force of the first-mentioned spring and an extending member secured to the cover of the casing for disengaging the second spring from the switch member and for biasing said spring in ineffective position to permit the first spring to hold the switch closed.

2. An enclosed electromagnetic switch comprising a switch member having an open and a closed position, a resilient member normally holding the switch closed, an

to bias the switch to closed position, electromagnetic means operative only while energized in excess of a predetermined degree for rendering the resilient member ineflective, a casing provided with a door for enclosing the device, means operative when the door is open to engage and actuate the switch member from its normal biased position and controlled upon the closing of the door to be disengaged from the switch mem-' her and rendered inoperative to actuate the same.

4. A circuit-controlling device comprising a switch member, an operating member therefor, a resilient member normally operative to control the operating member to bias the switch to closed position, means operative only under predetermined electrical conditions in the circuit to be controlled for actuating the switch member to open position, a casing provided with a door for enclosing the device, a second resilient member operative normally to engage andactuate the switch member vto open position when the door is open an a member con-V trolled by the door when in closed position to engage the second resilient member and hold the same in a biased position disengaged from the switch member.

In testimony whereof, I have hereunto subscribed my name this 4th day of Novem ber, 1920.

GEORGE W. HUEY. 

